A phase II trial (A6181040 study) on non-small cell lung cancer patients treated with sunitinib alone showed anti-tumor activity. In 63 enrolled patients treated with 4/2 schedule (4 weeks treatment, then two weeks interruption), 7 patients are confirmed partial response (overall response rate, 11%), and median progress-free time is 14.3 weeks. Presently, a phase III study is underway on non-small cell lung cancer patients followed by and now is under recruiting.